Valid usages of reserved keywords as identifiers
-----
<?php

class Test {
    function array() {}
    function public() {}

    static function list() {}
    static function protected() {}

    public $class;
    public $private;

    const TRAIT = 3, FINAL = 4;

    const __CLASS__ = 1, __TRAIT__ = 2, __FUNCTION__ = 3, __METHOD__ = 4, __LINE__ = 5,
          __FILE__ = 6, __DIR__ = 7, __NAMESPACE__ = 8;
    // __halt_compiler does not work
}

$t = new Test;
$t->array();
$t->public();

Test::list();
Test::protected();

$t->class;
$t->private;

Test::TRAIT;
Test::FINAL;

class Foo {
    use TraitA, TraitB {
        TraitA::catch insteadof namespace\TraitB;
        TraitA::list as foreach;
        TraitB::throw as protected public;
        TraitB::self as protected;
        exit as die;
        \TraitC::exit as bye;
        namespace\TraitC::exit as byebye;
        TraitA::
            //
            /** doc comment */
            #
        catch /* comment */
            // comment
            # comment
        insteadof TraitB;
    }
}
-----
array(
    0: Stmt_Class(
        flags: 0
        name: Test
        extends: null
        implements: array(
        )
        stmts: array(
            0: Stmt_ClassMethod(
                flags: 0
                byRef: false
                name: array
                params: array(
                )
                returnType: null
                stmts: array(
                )
            )
            1: Stmt_ClassMethod(
                flags: 0
                byRef: false
                name: public
                params: array(
                )
                returnType: null
                stmts: array(
                )
            )
            2: Stmt_ClassMethod(
                flags: MODIFIER_STATIC (8)
                byRef: false
                name: list
                params: array(
                )
                returnType: null
                stmts: array(
                )
            )
            3: Stmt_ClassMethod(
                flags: MODIFIER_STATIC (8)
                byRef: false
                name: protected
                params: array(
                )
                returnType: null
                stmts: array(
                )
            )
            4: Stmt_Property(
                flags: MODIFIER_PUBLIC (1)
                props: array(
                    0: Stmt_PropertyProperty(
                        name: class
                        default: null
                    )
                )
            )
            5: Stmt_Property(
                flags: MODIFIER_PUBLIC (1)
                props: array(
                    0: Stmt_PropertyProperty(
                        name: private
                        default: null
                    )
                )
            )
            6: Stmt_ClassConst(
                flags: 0
                consts: array(
                    0: Const(
                        name: TRAIT
                        value: Scalar_LNumber(
                            value: 3
                        )
                    )
                    1: Const(
                        name: FINAL
                        value: Scalar_LNumber(
                            value: 4
                        )
                    )
                )
            )
            7: Stmt_ClassConst(
                flags: 0
                consts: array(
                    0: Const(
                        name: __CLASS__
                        value: Scalar_LNumber(
                            value: 1
                        )
                    )
                    1: Const(
                        name: __TRAIT__
                        value: Scalar_LNumber(
                            value: 2
                        )
                    )
                    2: Const(
                        name: __FUNCTION__
                        value: Scalar_LNumber(
                            value: 3
                        )
                    )
                    3: Const(
                        name: __METHOD__
                        value: Scalar_LNumber(
                            value: 4
                        )
                    )
                    4: Const(
                        name: __LINE__
                        value: Scalar_LNumber(
                            value: 5
                        )
                    )
                    5: Const(
                        name: __FILE__
                        value: Scalar_LNumber(
                            value: 6
                        )
                    )
                    6: Const(
                        name: __DIR__
                        value: Scalar_LNumber(
                            value: 7
                        )
                    )
                    7: Const(
                        name: __NAMESPACE__
                        value: Scalar_LNumber(
                            value: 8
                        )
                    )
                )
            )
        )
    )
    1: Expr_Assign(
        var: Expr_Variable(
            name: t
        )
        expr: Expr_New(
            class: Name(
                parts: array(
                    0: Test
                )
            )
            args: array(
            )
        )
    )
    2: Expr_MethodCall(
        var: Expr_Variable(
            name: t
        )
        name: array
        args: array(
        )
    )
    3: Expr_MethodCall(
        var: Expr_Variable(
            name: t
        )
        name: public
        args: array(
        )
    )
    4: Expr_StaticCall(
        class: Name(
            parts: array(
                0: Test
            )
        )
        name: list
        args: array(
        )
    )
    5: Expr_StaticCall(
        class: Name(
            parts: array(
                0: Test
            )
        )
        name: protected
        args: array(
        )
    )
    6: Expr_PropertyFetch(
        var: Expr_Variable(
            name: t
        )
        name: class
    )
    7: Expr_PropertyFetch(
        var: Expr_Variable(
            name: t
        )
        name: private
    )
    8: Expr_ClassConstFetch(
        class: Name(
            parts: array(
                0: Test
            )
        )
        name: TRAIT
    )
    9: Expr_ClassConstFetch(
        class: Name(
            parts: array(
                0: Test
            )
        )
        name: FINAL
    )
    10: Stmt_Class(
        flags: 0
        name: Foo
        extends: null
        implements: array(
        )
        stmts: array(
            0: Stmt_TraitUse(
                traits: array(
                    0: Name(
                        parts: array(
                            0: TraitA
                        )
                    )
                    1: Name(
                        parts: array(
                            0: TraitB
                        )
                    )
                )
                adaptations: array(
                    0: Stmt_TraitUseAdaptation_Precedence(
                        trait: Name(
                            parts: array(
                                0: TraitA
                            )
                        )
                        method: catch
                        insteadof: array(
                            0: Name_Relative(
                                parts: array(
                                    0: TraitB
                                )
                            )
                        )
                    )
                    1: Stmt_TraitUseAdaptation_Alias(
                        trait: Name(
                            parts: array(
                                0: TraitA
                            )
                        )
                        method: list
                        newModifier: null
                        newName: foreach
                    )
                    2: Stmt_TraitUseAdaptation_Alias(
                        trait: Name(
                            parts: array(
                                0: TraitB
                            )
                        )
                        method: throw
                        newModifier: MODIFIER_PROTECTED (2)
                        newName: public
                    )
                    3: Stmt_TraitUseAdaptation_Alias(
                        trait: Name(
                            parts: array(
                                0: TraitB
                            )
                        )
                        method: self
                        newModifier: MODIFIER_PROTECTED (2)
                        newName: null
                    )
                    4: Stmt_TraitUseAdaptation_Alias(
                        trait: null
                        method: exit
                        newModifier: null
                        newName: die
                    )
                    5: Stmt_TraitUseAdaptation_Alias(
                        trait: Name_FullyQualified(
                            parts: array(
                                0: TraitC
                            )
                        )
                        method: exit
                        newModifier: null
                        newName: bye
                    )
                    6: Stmt_TraitUseAdaptation_Alias(
                        trait: Name_Relative(
                            parts: array(
                                0: TraitC
                            )
                        )
                        method: exit
                        newModifier: null
                        newName: byebye
                    )
                    7: Stmt_TraitUseAdaptation_Precedence(
                        trait: Name(
                            parts: array(
                                0: TraitA
                            )
                        )
                        method: catch
                        insteadof: array(
                            0: Name(
                                parts: array(
                                    0: TraitB
                                )
                            )
                        )
                    )
                )
            )
        )
    )
)